Graphene reinforced composite cable for offshore wind power and preparation process thereof

Abstract

The invention discloses a graphene reinforced composite cable for offshore wind power and a preparation process thereof, the graphene reinforced composite cable for offshore wind power comprises a plurality of core wires, the outer sides of the plurality of core wires are coated with insulating sleeve layers, the outer sides of the insulating sleeve layers are coated with graphene plating layers, and the graphene plating layers are coated with graphene. The outer sides of the multiple core wires are sleeved with multiple sets of evenly-distributed bearing and positioning frames, the multiple sets of bearing and positioning frames are fixedly assembled on the outer side of the graphene plating layer, the outer sides of the multiple sets of bearing and positioning frames are sleeved with positioning sleeve layers, the positioning sleeve layers are filled with filler, and the outer sides of the positioning sleeve layers are fixedly provided with protective sleeve layers. And the outer side of the protective sleeve layer is coated with a corrosion-resistant protective layer. According to the graphene reinforced composite cable for offshore wind power disclosed by the invention, through the arrangement of corresponding structures, the situation that the graphene composite cable is corroded and damaged due to the influence of an offshore environment is greatly reduced, the connection and conduction stability of the graphene composite cable is remarkably improved, and the service life of the graphene composite cable is greatly prolonged.

Description

Technical Field

[0001] The present invention belongs to the technical field of graphene composite cables, and in particular relates to a graphene reinforced composite cable for offshore wind power and a preparation process thereof. Background Art

[0002] Offshore wind power has become a key area for the development of renewable energy due to its rich resources, no land occupation and suitability for large-scale development. Composite cables for offshore wind power are cables used to transmit electrical energy and electrical signals to offshore wind power equipment. Composite cables for offshore wind power are an important component for the stable operation of offshore wind power.

[0003] Since the offshore environment is characterized by high corrosion, high humidity, strong winds and high degree of wire wear, higher requirements are placed on the performance of composite cables for offshore wind power. Traditional graphene composite cables mainly use a graphene coating on the outer layer of the core wire to improve the conductivity of the composite cable.

[0004] Although this method can improve the conductivity of graphene composite cables to a certain extent, in actual application, graphene composite cables are easily affected by corrosive seawater and sea air, resulting in outer layer corrosion and damage. This not only shortens the service life of the graphene cable, but also affects the connection and conduction stability of the graphene composite cable.

[0005] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0006] The object of the present invention is to provide a graphene reinforced composite cable for offshore wind power and a preparation process thereof, which can improve the connectivity stability of the graphene composite cable and extend the service life of the graphene cable.

[0007] In order to achieve the above object, a technical solution provided by a specific embodiment of the present invention is as follows: A graphene-reinforced composite cable for offshore wind power comprises a plurality of core wires, the outer sides of the plurality of core wires are coated with an insulating sheath, the outer sides of the insulating sheath are plated with a graphene coating, the outer sides of the plurality of core wires are sleeved with a plurality of groups of evenly distributed supporting and positioning frames, the plurality of groups of supporting and positioning frames are fixedly assembled on the outer sides of the graphene coating, the outer sides of the plurality of groups of supporting and positioning frames are sleeved with a positioning sheath, the positioning sheath is filled with fillers, the outer sides of the positioning sheath are fixedly assembled with a protective sheath, and the outer sides of the protective sheath are coated with a corrosion-resistant protective layer.

[0008] In one or more embodiments of the present invention, the plurality of core wires are braided by winding conductive metal wires, and the insulating sheath is a polytetrafluoroethylene sheath, which is fixedly sheathed on the outside of the core wires. By using the polytetrafluoroethylene sheath to insulate the core wires, the corrosion resistance of the core wires is improved, and the connection and conduction stability of the core wires is ensured.

[0009] In one or more embodiments of the present invention, the inner wall of the graphene coating is coated on the outer side of the insulating sheath, and the plurality of core wires, the insulating sheath and the graphene coating cooperate to form a graphene composite core wire. By adopting the graphene composite core wire to conduct the offshore wind power equipment, it has good conductor performance, corrosion resistance and thermal stability. At the same time, it has good mechanical strength. The graphene composite core wire is arranged at equal intervals under the action of multiple groups of supporting and positioning frames. By using multiple groups of supporting and positioning frames to support and position multiple graphene composite core wires at equal intervals, the deflection of multiple graphene composite core wires during the filling process of the filler is avoided, the preparation quality of the graphene composite cable is ensured, and at the same time, the adverse effects caused by the friction between multiple graphene composite core wires are reduced.

[0010] In one or more embodiments of the present invention, the support and positioning frame is composed of a plurality of positioning rings and a plurality of supporting ribs, and the plurality of positioning rings are sleeved on the outside of the plurality of core wires. The plurality of graphene composite core wires are supported and positioned by the plurality of positioning rings. The plurality of supporting ribs are arranged between the plurality of positioning rings. The plurality of supporting ribs play a role in assembling and fixing the positioning rings.

[0011] In one or more embodiments of the present invention, the filler is filled between the positioning sleeve layer and the multiple groups of graphene coatings, and the filler cooperates with the positioning sleeve layer to form an elastic positioning protection zone. The elastic positioning protection zone is used to elastically position the multiple graphene composite core wires, thereby reducing the adverse effects of vibration on the conduction state of the multiple core wires.

[0012] In one or more embodiments of the present invention, the protective sleeve layer is composed of a sleeve layer and a reinforcing grid, the reinforcing grid is arranged in the sleeve layer, and the reinforcing grid is woven from a plurality of carbon fibers. By arranging the reinforcing grid in the sleeve layer, the mechanical strength of the protective sleeve layer is improved, and the protective sleeve layer is guaranteed to protect the positioning sleeve layer.

[0013] In one or more embodiments of the present invention, the corrosion-resistant protective layer is a chloroprene rubber sleeve. The chloroprene rubber sleeve has good insulation and corrosion-resistant protection properties. Graphene powder is mixed in the chloroprene rubber sleeve. The corrosion-resistant protection performance of the corrosion-resistant protective layer is improved by filling the corrosion-resistant protective layer with graphene powder. The outer side of the corrosion-resistant protective layer is coated with a polymer water-proof coating. By coating the outer side of the corrosion-resistant protective layer with a polymer water-proof coating, the occurrence of seawater adhering to the outer surface of the corrosion-resistant protective layer is reduced, and the corrosion of the corrosion-resistant protective layer caused by seawater is reduced.

[0014] A preparation process of a graphene-reinforced composite cable for offshore wind power, comprising the following steps: S1. Preparation of the core wire, covering the outer side of the core wire with an insulating sheath, and fixing the insulating sheath on the outer side of the core wire by heating and curing; S2, plating positioning, cleaning the outer surface of the insulation sleeve after thermal curing, and plating the outer surface of the insulation sleeve with a graphene coating by a plating process, so that the core wire, the insulation sleeve and the graphene coating cooperate to form a graphene composite core wire, and multiple sets of supporting and positioning frames are equidistantly mounted on the outside of the multiple core wires; S3, filling and positioning, a positioning sleeve is set on the outer side of multiple groups of supporting and positioning frames, and filler is filled into the positioning sleeve, and the filler is also cured by heat curing, so that the positioning sleeve and the filler cooperate to form an elastic positioning protection zone, and the elastic positioning protection zone is used to buffer and position multiple core wires; S4, protective layer installation, the protective sleeve layer and the corrosion-resistant protective layer are fixedly installed on the outer side of the positioning sleeve layer in sequence to form a protective outer layer, thereby forming a graphene composite cable; S5. Performance testing: testing the performance parameters of the graphene composite cable.

[0015] In one or more embodiments of the present invention, the plating process in S2 includes: graphene solution preparation, plating, drying and post-processing.

[0016] Compared with the prior art, the graphene-enhanced composite cable for offshore wind power disclosed in the present invention greatly reduces the corrosion and damage of the graphene composite cable caused by the offshore environment through the setting of corresponding structures, significantly improves the connection and conduction stability of the graphene composite cable, and greatly extends the service life of the graphene composite cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of the structure of a graphene-reinforced composite cable for offshore wind power in one embodiment of the present invention; Figure 2 for Figure 1 Schematic diagram of the structure at A in the middle; Figure 3 This is a partial structural schematic diagram of a graphene-reinforced composite cable for offshore wind power in one embodiment of the present invention; Figure 4 for Figure 3 Schematic diagram of the structure at B in the middle; Figure 5 It is a side cross-sectional view of a graphene-reinforced composite cable for offshore wind power in one embodiment of the present invention; Figure 6 for Figure 5 Schematic diagram of the structure at C in the middle; Figure 7 A three-dimensional diagram of a reinforcement grid in one embodiment of the present invention; Figure 8 The present invention is a flowchart of a process for preparing a graphene-reinforced composite cable for offshore wind power in one embodiment of the present invention.

[0019] Description of main reference numerals: 1-core wire, 2-insulating sleeve, 3-graphene coating, 4-supporting positioning frame, 401-positioning ring, 402-supporting rib, 5-positioning sleeve, 6-filler, 7-protective sleeve, 701-sleeve, 702-reinforced grid, 8-corrosion-resistant protective layer. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0021] like Figures 1 to 8 As shown, a graphene-reinforced composite cable for offshore wind power in one embodiment of the present invention includes a plurality of core wires 1.

[0022] Specifically, the plurality of core wires 1 are all formed by winding and braiding conductive metal wires.

[0023] like Figure 1 to Figure 2 As shown, the outer sides of the plurality of core wires 1 are all covered with an insulating sheath 2. The insulating sheath 2 is used to perform assembly positioning and insulation protection on the core wires 1.

[0024] It is worth noting that the insulating sheath 2 is a polytetrafluoroethylene sheath, and the insulating sheath 2 is fixedly sheathed on the outside of the core wire 1. By using the polytetrafluoroethylene sheath to insulate and protect the core wire 1, the corrosion resistance of the core wire 1 is improved, and the connection and conduction stability of the core wire 1 is ensured.

[0025] like Figure 3 to Figure 4 As shown, the outer side of the insulating sheath 2 is plated with a graphene coating 3. By coating the graphene coating 3 on the outer side of the insulating sheath 2, the conductor performance, corrosion resistance and mechanical strength of the core wire 1 are improved.

[0026] The inner wall of the graphene coating 3 is coated on the outer side of the insulating jacket 2, and the multiple core wires 1, the insulating jacket 2 and the graphene coating 3 cooperate to form a graphene composite core wire. By using the graphene composite core wire to conduct the offshore wind power equipment, it has good conductor performance, corrosion resistance and thermal stability. At the same time, it has good mechanical strength.

[0027] like Figure 3 to Figure 4 As shown, multiple sets of evenly distributed supporting and positioning frames 4 are set on the outside of the multiple core wires 1, and the multiple sets of supporting and positioning frames 4 are fixedly assembled on the outside of the graphene coating 3. The multiple core wires 1 are supported and positioned by the multiple sets of supporting and positioning frames 4, thereby ensuring the molding stability of the multiple core wires 1.

[0028] like Figure 3 to Figure 4 As shown, the graphene composite core wires are arranged at equal intervals under the action of multiple groups of supporting and positioning frames 4. Multiple groups of supporting and positioning frames 4 are used to support and position multiple graphene composite core wires at equal intervals, thereby avoiding the deflection of multiple graphene composite core wires during the filling process of the filler 6, ensuring the preparation quality of the graphene composite cable, and at the same time, reducing the adverse effects caused by the friction between the multiple graphene composite core wires.

[0029] like Figure 3 to Figure 4 As shown, the supporting and positioning frame 4 is composed of a plurality of positioning rings 401 and a plurality of supporting ribs 402, and the plurality of positioning rings 401 are all sleeved on the outside of the plurality of core wires 1. The plurality of graphene composite core wires are supported and positioned by the plurality of positioning rings 401. The plurality of supporting ribs 402 are arranged between the plurality of positioning rings 401. The plurality of supporting ribs 402 play a role in assembling and fixing the positioning rings 401.

[0030] like Figures 5 and 6As shown, the outer sides of the multiple groups of supporting and positioning frames 4 are sleeved with positioning sleeves 5. The multiple groups of supporting and positioning frames 4 and the fillers 6 are sleeved and limited by the positioning sleeves 5, so as to facilitate the subsequent filling of the fillers 6.

[0031] like Figures 5 and 6 As shown, the positioning sleeve layer 5 is filled with filler 6. The filler 6 is used to position and elastically buffer the multiple core wires 1.

[0032] The filler 6 is filled between the positioning sleeve layer 5 and the multiple groups of graphene coatings 3, and the filler 6 cooperates with the positioning sleeve layer 5 to form an elastic positioning protection zone. The multiple graphene composite core wires are elastically positioned by the elastic positioning protection zone, thereby reducing the adverse effects of vibration on the conduction state of the multiple core wires 1.

[0033] like Figures 5 and 6 As shown, the outer side of the positioning sleeve layer 5 is fixedly equipped with a protective sleeve layer 7. The protective sleeve layer 7 plays the role of insulating, anti-corrosion and improving the mechanical strength of the positioning sleeve layer 5.

[0034] like Figures 5 to 7 As shown, the protective sleeve layer 7 is composed of a sleeve layer 701 and a reinforcing grid 702. The reinforcing grid 702 is arranged in the sleeve layer 701 and is woven from a plurality of carbon fibers. By arranging the reinforcing grid 702 in the sleeve layer 701, the mechanical strength of the protective sleeve layer 7 is improved, and the protective sleeve layer 7 is guaranteed to protect the positioning sleeve layer 5.

[0035] like Figures 5 to 7 As shown, the outer side of the protective jacket layer 7 is coated with a corrosion-resistant protective layer 8. The corrosion-resistant protective layer 8 provides corrosion-resistant protection for the protective jacket layer 7.

[0036] Specifically, the corrosion-resistant protective layer 8 is a chloroprene rubber sleeve. The chloroprene rubber sleeve has good insulation and corrosion-resistant protective properties. Graphene powder is mixed in the chloroprene rubber sleeve. The corrosion-resistant protective layer 8 is filled with graphene powder to improve the corrosion-resistant protective layer 8.

[0037] It is worth noting that the outer side of the corrosion-resistant protective layer 8 is coated with a polymer water-proof coating. By coating the outer side of the corrosion-resistant protective layer 8 with a polymer water-proof coating, the occurrence of seawater adhering to the outer surface of the corrosion-resistant protective layer 8 is reduced, and the corrosion of the corrosion-resistant protective layer 8 caused by seawater is reduced.

[0038] A preparation process of a graphene-reinforced composite cable for offshore wind power, comprising the following steps: S1, core wire preparation, covering the outer side of the core wire 1 with an insulating sheath 2, and fixing the insulating sheath 2 on the outer side of the core wire 1 by heating and curing; S2, plating positioning, cleaning the outer surface of the insulating sleeve 2 after thermal curing, and plating the outer surface of the insulating sleeve 2 with a graphene coating 3 by a plating process, so that the core wire 1, the insulating sleeve 2 and the graphene coating 3 cooperate to form a graphene composite core wire, and multiple sets of supporting and positioning frames 4 are equidistantly mounted on the outside of the multiple core wires 1; S3, filling and positioning, a positioning sleeve 5 is set on the outer side of the multiple groups of supporting and positioning frames 4, and a filler 6 is filled into the positioning sleeve 5, and the filler 6 is also cured by heat curing, so that the positioning sleeve 5 and the filler 6 cooperate to form an elastic positioning protection zone, and the multiple core wires 1 are buffered and positioned by the elastic positioning protection zone; S4, protective layer installation, the protective sleeve layer 7 and the corrosion-resistant protective layer 8 are fixedly installed on the outer side of the positioning sleeve layer 5 in sequence to form a protective outer layer, thereby forming a graphene composite cable; S5. Performance testing: testing the performance parameters of the graphene composite cable.

[0039] Specifically, the plating process in S2 includes: graphene solution preparation, plating, drying and post-processing.

[0040] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0041] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A graphene-reinforced composite cable for offshore wind power, characterized in that: It comprises a plurality of core wires, the outer sides of the plurality of core wires are coated with an insulating sheath, the outer sides of the insulating sheath are plated with a graphene coating, the outer sides of the plurality of core wires are sleeved with a plurality of groups of evenly distributed supporting and positioning frames, the plurality of groups of supporting and positioning frames are fixedly assembled on the outer sides of the graphene coating, the outer sides of the plurality of groups of supporting and positioning frames are sleeved with a positioning sheath, the positioning sheath is filled with fillers, the outer sides of the positioning sheath are fixedly assembled with a protective sheath, and the outer sides of the protective sheath are coated with a corrosion-resistant protective layer.

2. The graphene-reinforced composite cable for offshore wind power according to claim 1, characterized in that: The plurality of core wires are all formed by winding and weaving conductive metal wires, and the insulating sheath is a polytetrafluoroethylene sheath, which is fixedly sheathed on the outer side of the core wire.

3. The graphene-reinforced composite cable for offshore wind power according to claim 1, characterized in that: The inner wall of the graphene coating is coated on the outer side of the insulating sleeve, and the plurality of core wires, the insulating sleeve and the graphene coating cooperate to form a graphene composite core wire, and the graphene composite core wire is arranged at equal intervals under the action of a plurality of groups of supporting and positioning frames.

4. The graphene-reinforced composite cable for offshore wind power according to claim 1, characterized in that: The supporting and positioning frame is composed of a plurality of positioning rings and a plurality of supporting ribs. The plurality of positioning rings are sleeved on the outside of the plurality of core wires, and the plurality of supporting ribs are arranged between the plurality of positioning rings.

5. The graphene-reinforced composite cable for offshore wind power according to claim 1, characterized in that: The filler is filled between the positioning sleeve layer and the multiple groups of graphene coatings, and the filler cooperates with the positioning sleeve layer to form an elastic positioning protection zone.

6. The graphene-reinforced composite cable for offshore wind power according to claim 1, characterized in that: The protective sleeve layer consists of a sleeve layer and a reinforcing grid. The reinforcing grid is arranged in the sleeve layer and is woven from a plurality of carbon fibers.

7. The graphene-reinforced composite cable for offshore wind power according to any one of claims 2, 3, 4 or 5, characterized in that: The protective sleeve layer consists of a sleeve layer and a reinforcing grid. The reinforcing grid is arranged in the sleeve layer and is woven from a plurality of carbon fibers.

8. The graphene-reinforced composite cable for offshore wind power according to claim 1, characterized in that: The corrosion-resistant protective layer is a chloroprene rubber sleeve layer, graphene powder is mixed in the chloroprene rubber sleeve layer, and the outer side of the corrosion-resistant protective layer is coated with a polymer water-proof coating.

9. A process for preparing a graphene-reinforced composite cable for offshore wind power, characterized in that: The following steps are involved: S1. Preparation of the core wire, covering the outer side of the core wire with an insulating sheath, and fixing the insulating sheath on the outer side of the core wire by heating and curing; S2, plating positioning, cleaning the outer surface of the insulation sleeve after thermal curing, and plating the outer surface of the insulation sleeve with a graphene coating by a plating process, so that the core wire, the insulation sleeve and the graphene coating cooperate to form a graphene composite core wire, and multiple sets of supporting and positioning frames are equidistantly mounted on the outside of the multiple core wires; S3, filling and positioning, a positioning sleeve is set on the outer side of multiple groups of supporting and positioning frames, and filler is filled into the positioning sleeve, and the filler is also cured by heat curing, so that the positioning sleeve and the filler cooperate to form an elastic positioning protection zone, and the elastic positioning protection zone is used to buffer and position multiple core wires; S4, protective layer installation, the protective sleeve layer and the corrosion-resistant protective layer are fixedly installed on the outer side of the positioning sleeve layer in sequence to form a protective outer layer, thereby forming a graphene composite cable; S5. Performance testing: testing the performance parameters of the graphene composite cable.

10. The process for preparing a graphene-reinforced composite cable for offshore wind power according to claim 9, characterized in that: The plating process in S2 includes: graphene solution preparation, plating, drying and post-processing.

Images